1. PowerShell Studio, PoshGUI
2. VSCode is more flexible and is the successor to the ISE, thus it is an inherently better tool.
3. It is installed by default Server 2008 R2 onward.
4. It can be downloaded from code.visualstudio.com
5. Enable Git if necessary, install the PowerShell extension, customize.
6. IntelliSense is a feature of both the ISE and VS Code that enables autocompletion features.
7. Git is a source control system. It makes sense to work with Git when contributing to open source projects or when developing with multiple people.

8. Both support the F5 key as well as a Debug menu to start a script. Both also support using the F8 key to execute a selection.
9. Both support setting breakpoints with F9 or the Debug menu.